In terms of connecting to the ISP
A. define the vlan to ether1
B. use the vlan in DHCP client
/interface vlan
add interface=ether1 name=ISP-110 vlan-id=110
/ip dhcp-client
add interface=ISP-110
In terms of vlan setup read this: http://forum.mikrotik.com/t/using-routeros-to-vlan-your-network/126489/1
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